Athanasius Sakharov was a 20th-century Russian Orthodox bishop and hymnographer who became a prominent figure in the catacomb church movement. Born Sergei Sakharov in 1887, he pursued a religious life from a young age, eventually receiving the monastic name Athanasius at the Moscow Theological Academy. Despite facing intense persecution from the Soviet authorities, he remained committed to his faith and his role as a spiritual leader, serving as the Bishop of Kovrov after enduring decades of imprisonment and exile.